Road sign tire mount



FIG. 1 is a perspective view of the new design for a road sign mount being a tire;

FIG. 2 is a front elevational view thereof; the rear and side elevational views being a mirror image; and,

FIG. 3 is a top view thereof; the bottom view being a mirror image.

In the drawings, the broken lines are for environmental structure purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a road sign tire mount, as shown and described. 